Improvement in nut-machines



l 2 Sheets-Sheet 1. F. WATKINS. A

Nut, Machine.Y

Patented Dec. 8, 1868.'

N. PETERS Phntmhqmher, washington, D. C,

2 Sheetsf-Sheet 2.

Patented Dec. 8, `1868.-

UNITED STATES PATENT FFIGE.

FRANCIS VATKINS, OF BIRMINGHAM, ENGLAND.

IMPROVEMENT IN NUT-MACHINES.

Specification forming part of Letters PatentNo. SLl, dated December 8,1868; antedated November 28, 1863.

To all whom 'it may concern:

Be it known that I, FnANcrs WATKINs, of Birmingham, in the county ofWarwick, England, have invented a new and Improved Machine for Punchingand Shaping Screw-Nuts, &c. and I do hereby declare that the followingis a full, clear, and exact description thereof, which will enableothers skilled in the art to make and use the same, reference being hadto the accompanying drawings, forming part of this speciiication.

Figure l, Sheet 1, represents a front elevation of my invention. Fig. 2,Sheet 1, is a horizontal section of the same, the plane of section beingindicated by the line x m, Fig. l. Fig. 3, Sheet 2, is a detailhorizontal section of the same. Fig. 4, Sheet 2, is an end elevation ofthe same. Figs. 5 and 6, Sheet 2, are face views of nuts as they aremade in this machine.

Similar letters of reference indicate corresponding parts.

This invention relates to a new machine for cutting, shaping, andpunching screw-nuts of all kinds, the machine consisting of two workingparts, in each of which nuts are being formed, the two parts workingalternately, so that a nut is bein g cut, shaped, and punched on oneside while a finished nut is being ejected from the other side, and thusthe power required to drive one machine is utilized to operate two.

On the main shaft of the machine is a driving-wheel which gears into aspur-wheel, and thereby drives another shaft, on which are keyed twocams, actuating two slides, which.

- carry compound punches, the solid punches carried by one slide workingwithin the ring punches carried by the other., The machine isdouble-acting, and there are similar tools at each end of each slide.

The slide which carries the ring-punches actuates two other slides,opposite its two ends, by means of rods iixed to the first slide andpassing through the others. The rods have adjustable nuts upon them, andallow a certain amount of independent motion in the end slides, whichalso carry ring-punches similar to those carried by the slide whichactnates them. Dies or forming-boxes, in which the articles to be madeare formed, are secured to the frame ofthe machine by means of bolts orotherwise.v

Vhen the machine is set in motion, a bar is placed between the formingdie or boX and the ring-punch of the central slide, whichpunch forcesoft' a piece and drives it into the forming die or box against thering-punch of the outer slide, which forms the bottom of the box.

A continued advance of the cutting-punch car. ries the blank into thedie-box until it is firmly i compressed between the two rin g-punches,the motion of the outer punch being arrested by a set-screw fitted inthe frame.

The face of the outer ring-punch has the. shape which is to be given tothe face of the nut, and by the pressure the blank is formed as desired.The shaping-punch is made removable, as well as the stationary die andthe cuttingpunch, so that the machine may be adapted to make varioussized and shapednuts.

Vhen the blank has been pressed into the required form, the solid orpiercing punch advances through the end rin g-punch and pierces theblank, making a hole of the required diameter, and forcing the punchings into the hollow cutting-punch, from which they are discharged againby means of another piercing-punch during the backward motion of thecuttingpunch. Duringthe saidbackwardmotionofthe cutting-punch the endring-punch is dragged along by means of adjustable nuts formed on theends of the rods which pass through the block to which the said endpunch is attached, and by suc-h motion of the end punch the finishedblank is discharged from the stationary die. While this is being donethe tools at the other end of the slides are beginning the operation ofcutting off the blank, the making of which is in all respects similar tothat already described.

In the accompanying drawing, A represents the frame of the machine. Brepresents the main drivin g-shaft, carrying a pinion, a, which gearsinto a spur-wheel, b, mounted on a horizontal shaft, C, as shown. Theshaft C carries two cams, c and d, which respectively actua-te twosliding frames, D and E, imparting to them reciprocating motion. Thecams c and d project about from opposite sides 0f consequentlybe adescription of the other side.

From each side of the slide D project two or more rods, e e, (seeFig.4,) which pass through a sliding frame, G, on which a punch, H, isheld. The rods e pass loosely Vthrough the frame G, and do not move thesame, except when they move in the direction of the arrows 1, Fig. 1,when nuts f, fitted to their ends, carry the frame G toward the shaft C.

The punch H is of the same outer diameter and shape as the punch F, andis also perforated like the same. The punches F and H are also in thesame plane.

I is a stationary die projecting from and secured to the frame A, andbeing perforated that it may receive the punches F and H, as shown inFig. 3.

From the frame E projects a punch, J, the diameter of which is as largeas the hole in the punch F. To the ends of rods '11 e', which projectfrom the frame E,is also fastened a crosshead, g, in which anotherpunch, K, of the same diameter as the punch J, is held.

The operation is as follows: The end of an iron bar is held againststops h h, provided on the face of the die I, as shown by red lines inFig. 2 on the left-hand side. The machine being then set in motion, thepunch F moves toward the die I and cuts off a blank of the required sizeand forces the same into the die. There the blank is pushed against theend of the punch H, and as the same can move independent of the otherdevices, it is moved by the punch F and the blank until it strikesagainst an adjustable screw-stop, L, secured to the frame A, as shown.The further motion of the punch H isthen stopped, but the punch Fcontinues to move slightly toward it, and

thereby the blank is pressed between the faces of the two punches andreceives the required form, as indicated in Fig. 3. When the blank hasbeen thus pressed the forward motion of the punch F ceases and the frameE commences to move backward-that is, toward the shalt C-and thereby thepiercing-punch Kis set in motion, the4 same passing through the punch Hand throughthe blank into the punch F, as indicated in Fig. 3, therebyperforating the blank and pushing the punching into the punch F, asshown. Then the frame D commences to recede, drawing the punch F towardthe shaft C, and the punching is ejected from the punch F by the punch Jduring this receding motion of the punch. When, during the same motion,the nuts f strike against the frame G, the same will also be carriedtoward the axle C, and will thereby be moved through the die I, so as todischarge the blank from the .sa-me.

Vhile the blank is being cut, pressed, and punched on one side of themachine the other side ejects the blan'k and punching, and is therebyprepared for another blank. While a nut is formed on one side ofthemachine a different sized and shaped nut can at the same time be formedon the other side.

I claim as new and desire to secure by Letters Patent- The combination,with each other, of the reciprocating frames D and E, stationary die I,punches F, J, and K, slide G, punch H, and stop L, all made, arranged,and operating substantially as and for the purpose herein shown anddescribed.

F. AVVATKINS.

Witnesses:

WM. F. MUNAMARA, ALEX. F. ROBERTS.

